#support - VAPI

can i have some help with the vapi app please i dont get it

Warm Assistant Transfer - Unable to pass override variables

Hey guys, I'm doing a warm transfer using the experimental option with a wait for user to speak first configured.

When I do a outbound call, I have unique variables being passed into the prompt which is working correctly. However, when I want to do a warm transfer with it being configured to wait before someone speaks before doing the summary, the variables is not being passed through.

From researching online I can see it references the "Context" gets provided to the transfer assisstant. Is this just the transcript of the conversation? Is there anyway to pass variables or even the previous prompt of the 1st assisstant to the transfer assisstant? I have a transfer ID variable that will not be said during the conversation to the customer, but must be said during the transfer process.

Pii Support

sad-indigo12/14/25, 5:26 PM

Is there a way to mask out the name so that it does not gets sent to transcriber or model?
@Vapi @Duckie

Tool Request Body Not Sending Parameters (Always {})

developed-pink12/13/25, 4:20 PM

Problems I’m experiencing:
When I press Test Tool, the Request Body (auto-generated from variables) is always just:

{}
Even after filling all parameters and marking required ones, the request body does not include any values.

In n8n, the incoming webhook request shows:

{
"body": "{}"
}
which means Vapi is not sending the parameters at all.

When I manually test n8n with sample JSON, everything works correctly, so the issue is only coming from Vapi not generating the request body.

Call Center Support

skinny-azure12/13/25, 3:26 PM

Hello team,

I want to build a call center from scratch using VAPI. I don’t have much software knowledge. I’ve watched many articles and videos, but I haven’t been successful. Where can I get support on this topic?

Devs, What does the internal DTMF tool code actually look like?

uncertain-scarlet12/13/25, 3:09 PM

I'm building my own custom DTMF tool which is going to be using typescript and it takes in multiple arguments. I'd like to know how the original is built, so I can build upon it.

I am facing an issue connecting Google Calendar to my Vapi account.

military-pink12/13/25, 3:56 AM

Hi Vapi team,

I am facing an issue connecting Google Calendar to my Vapi account.
Steps to reproduce:
-Go to More → Integrations → Tools Provider → Google Calendar
-Click Connect
-Select my Google account and allow all requested permissions
-Google shows the flow as finished and redirects back to Vapi, but the button still shows “Connect” and the integration is not saved

Details:
-Assistant ID: d78737b7-1c9d-4ef3-a31a-eda8b32ad1fd
-Google account email used: yapdiyan@gmail.com
-Tried multiple times, different browsers, and incognito; issue persists
-Screenshot attached (shows the Google Calendar integration page with the Connect button)

I saw that other users are reporting similar Google Calendar integration issues (OAuth finishes but connection does not persist). Could someone from the team please help check my account on the backend or share a current workaround so I can use calendar-based scheduling for my client?

support

WhatsApp_Image_2025-12-13_at_09.18.06_5abf9755.jpg

Enable Tool-based Integrations for my Vapi Org

recent-teal12/12/25, 9:41 PM

Hi, I have connected Make at the org level but I do not see Make as an option
inside Tool nodes in agent flows.
Can you enable Tool-based integrations (Make) for my org?

Stop Speaking Plan not working

safe-amethyst12/12/25, 9:26 PM

https://dashboard.vapi.ai/calls/019b143f-24d4-700e-8fc2-133914c5aed1

I’m trying to make the voice agent more conversational so that the user can interrupt the agent at any time. However, this doesn’t seem to work, the agent only recognizes user speech after it finishes speaking. I want the user to be able to speak and interrupt the agent at any moment.

I’ve tried enabling the Stop Speaking Plan in the advanced settings, but it doesn’t seem to have any effect. Regardless of the configuration, the agent still ignores the user while it’s talking.

Has anyone else encountered this issue or found a workaround?

VAPI Dashboard - Voice AI Management Platform

Build and manage voice AI agents that conduct human-like conversations. Access real-time analytics, configure assistants, and monitor your AI voice applications.

in our chat, not voice, We are getting high token and billing

scattered-teal12/12/25, 8:24 PM

We are seeing crazy high charges for chat messsages like 5 cents just for a single input and output. I see the token is high is this because of something we have configured incorrectly? @Duckie

do you support dynamic keyword boosting?

instant-harlequin12/12/25, 7:36 PM

the transcriber is really struggling on emails. i want to inject emails into keywords when an api call returns, to better recognize the user's email. is that possible today? can it be?

Concurrency limit hit

sad-indigo12/12/25, 6:26 PM

Hello!
I currently have 27 concurrency lines and no calls being made. When I try to make a new call, it says my concurrency limit has been hit when I know this is not possible.
Would you please be able to reset my concurrency lines?

Concurrency Management – Separating Inbound and Outbound Flows

rubber-blue12/12/25, 6:02 PM

Hi Vapi Team,

We are currently using your platform to design and operate two types of assistants: Inbound and Outbound.

Our goal is to clarify the best architectural approach to manage concurrency limits, ensuring that inbound calls are always available, even while large outbound campaigns are running.

Context

Inbound calls must be available at all times (we are using Redis to manage a queue on our side).

Outbound campaigns may involve a high volume of calls (e.g. 1,000–2,000 calls).

The main concern is that outbound campaigns can fully consume the available concurrency, making inbound lines temporarily unavailable.

Increasing the total number of concurrency lines alone does not fully solve the problem. For example, even with 1,000 concurrency lines, a sufficiently large outbound campaign could still saturate all available channels and block inbound calls.

Proposed Approach

Our current idea is to logically separate inbound and outbound traffic by using two different Vapi organizations:

Inbound Org

Dedicated to inbound assistants

Allocated with X concurrency lines

Ensures inbound availability at all times

Outbound Org

Dedicated exclusively to outbound campaigns

Allocated with Y concurrency lines

Used only for outbound execution

This way, outbound campaigns would never compromise inbound availability, as each flow would have its own isolated concurrency pool.

Questions

If we create a new organization using “Switch organization → New organization” within our existing account:

Will this new org automatically receive its own set of concurrency lines (e.g. +10)?

Or does it share the same concurrency pool as the parent organization?

If concurrency is shared, should the outbound org be created entirely outside the current organization (with a separate account / email) to guarantee isolation?

Is there any native or technical mechanism in Vapi to:

Reserve or cap concurrency for outbound campaigns (e.g. “use only X lines for outbound”)

Integrating Azure Speech

wispy-yellow12/12/25, 2:23 PM

Hi, I'm struggling with this integration. I've created the Azure speech resource, and have my keys. In the VAPI integrations page I try selecting region UK and add my key, but it keeps getting rejected with error because VAPI is trying https://uk.tts.speech.microsoft.com whereas apparently it should be https://uksouth.tts.speech.microsoft.com
Can anyone advise?

Workflow API request timeout

popular-magenta12/12/25, 1:59 PM

We have a workflow for appointment bookings that is close to getting to production.

The issue I am facing is that the API request nodes seem to timeout after 5 seconds, even if I set the timeoutSeconds to a bigger value. Please fix this as soon as possible, or let me know what I need to change, since we are on a tight timeline.

How to store tool call response as a variable in dashboard

comprehensive-tomato12/12/25, 11:02 AM

@Vapi @Duckie
I’m working with a tool call named that successfully returns available slots as an array of objects.
What I’d like to do is store this tool response in a variable within the dashboard, so that I can later reference it in my flow using .

Could you please guide me on:

How to capture the tool’s response and assign it to a variable in the dashboard?

API

technical-ivory12/12/25, 10:37 AM

Hello,
Please add an API endpoint that allows purchasing additional concurrency lines for voice agents on demand.
This is required to scale traffic automatically without manual actions.
Thank you.

Tools (Query) Problem

worthy-rose12/12/25, 9:21 AM

Hi team, I’m building a Voice Agent on the Vapi.ai platform and ran into an issue with the Tool (Query). The agent successfully calls the tool, but the response says “No document found for field.” I’ve already checked both Files and the Knowledge Base, and the IDs are correct. Could you help me figure out how to fix this? (By the way The content in My Files and the Knowledge Base is in Chinese. )

'model-output' is not working for realtime model

skinny-azure12/12/25, 6:12 AM

Hi team, seems like 'model-output' webhook message is not working for GPT realtime model, it doesn't output the model response (except tool calls for some reason), please help to check on this

'model-output' server message output is not in sequence

skinny-azure12/12/25, 6:08 AM

Hi team, so I wanted to use model-output webhook server message to do some background processing, so I implemented a buffer and everything, but when I try it out it doesn't give me the correct sentence, it will be scrambled like this:

can I get the sequence index somehow?